Apparatus for coating printing-rolls.



mtrwsses.

E. MERTBNS.

APPARATUS FOR COATING PRINTING ROLLS.

APPLICATION FILED OUT. 31, 1910.

Patented Feb. 7, 1911.

Tnve'nror.

' carriage B is slidably UNIT STTES EDUARD MERTENS, OF FREIBERG, BBEISGAU,

GERMANY.

\ APPARATUS FOR COATING PRINTING-ROLLS.

man Emperor, residing at Freiaustrasse (S0,

Breisgau, Germany, have invented for Freiberg, a new and useful Improved Apparatus Coating Printing-Rolls and the Like, which the following is a specification.

This invention relates to improvements in apparatus for coating rolls with varnish or similar substance, and embraces certain features analogous to those set forthin my pending United States application, #537,830.

This device has for an object, to coat .cylinders with a liquid substance, by applying the same nozzle, in a fine stream, upon the surface of the cylinder, while said cylinder is rotating and the nozzle is moving horizontally in the direction of the axis of the cylinder.

It has for a further object, to permit the nozzle to reciprocate in a plane vertical to the roller axis, in such a manner that it conforms to all'the motions of the roller surface, but cannot move horizontally with relation to the carriage which supports the nozzle.

A still further object is to. so dispose the outlet of the nozzle with relation to a guide on which it reciprocates, that, friction on said guide will be reduced to a minimum. A still further object is to provide a flexible liquid supply means connecting said nozzle and a supply reservoir, whereby said nozzle will have minimum resistance to the reciprocative motion.

In the preferred form and embodiment of my invention, I attain the foregoing objects by the mechanism illustrated in Figure 1 of the accompanying drawings, in which the invention is shown by a view in side elevation partly in section. Fig. 2 is a horizontal sectional detail of the nozzle carrier and its adjuncts, taken on the line 22, Fig. 1. Fig. 3 is a detail view showing a modification in which a track is shown upon the bed plate.

In the drawings, A designates a reservoir, which is mounted upon a carriage B, which is adapted to be moved horizontally by any proper means over the base C. One of said means is illustrated in Fig. 3 in which the seated on a track 6 which is stationary on the bed late. A cylinder J, which is to be coated with liquid,

Specification of Letters latent.

through the 'medium of a Patented Feb. a, 1911.

Application filed October 31, 1910. Serial No. 590,030.

is. rotatably mounted under the end of a lateral extension of an arm N, the axis of the ,dylinder of motion of the carriage B. A flexible tube D having a nozzle E secured thereto, is connected to the reservoir and adapted to carry liquid from the reservoir to the cylinder,

being parallel to the direction through an outlet in the down-turned end of the nozzle E. A guide M, which may be of prismatic cross section or of any proper form, is secured to the arm N and extends downward therefrom. This guide is shown slightly non-vertical and in radial alinement with the cylinde' not limited to the exact position of this guide, on which is slidably seated jan a-pen tured boss L, the aperture of which conforms to the sides of said guide.

ally and downwardly extending .arm K, The carrier K is apertured for receiving the nozzle, the aperture being of a proper relative size to provide asnug fit for the nozzle whereby the latter is normally held in posi tion by frictional engagement, but is susceptible of adjustment by the application of sufficient force.

The relation of members M and L, as described, provides a means by which the nozzle may be raised and lowered to accommodate and coat cylinders of different sizes and to conform to cylinders of a concentric or uneven formation.

In practicingmy invent on, any proper means for rotating the cylinder J may be J; but the invention is A nozzle carrier K is secured to said boss by a later-' employed. The cylinder may be chucked in a lathe of ordinary construction and the carriage B may be moved by the usual lathe tool carriage; or the cylinder may be rotated and caused to simultaneously move in the direction of its axis while the tank A and nozzle E remain stationary.

The invention comprises a relative horizontal movement of the cylinder and nozzle, the "exact'manner or means of effecting this movement being no part of this invention, and not illustrated.

The outlet of the nozzle is preferably arranged under or in central alinement with the guide bar M, so that there will be no leverage which would cause undue friction due to binding or torque of the slide L on I i the guide bar M.

The down-turned end of the nozzle provides a means by which the outlet of the nozzle is sealed, being held against the sur- I face of, the cylinder by the weight of the tion of 'the spreading means i let being in central alinement mg means, and means for causing relativemembers E, L and K,'and should the rota cylinder cease, the liquid in the nozzle E and tube D would thus be prevented from flowing in excess upon said surface. Moreover, this feature provides a for the liquid being'applied, as well as a etc., from the surface immediately preceding the application of the liquid.

' LA liquid coating, device comprising reservoir, a nozzle connected with the reservoir by means of a flexible tube, a carrier'for the nozzle said nozzle having a downturned end provided with an outlet, a rotatable cylinder under said nozzle, thenozzle carrier being connected with reciprocative guiding means whereby the nozzle bears upon the surface ofsaid cylinder and reciprocates in conformity with irregularities in said cylinder when the cylinder rotates, the said outwith the guidhorizontal movement of the cylinder.

2. A liquid coating reservoir, a nozzle having a down-turned nozzle and the -end provided with an outlet, a rotatable means for removing dust,

'dGVlCG comprising a 4 teams is normally closed, and means for causing movement of the nozzle relative horizontal and the cylinder.

3. In an attachment for alathe or the like having a tool carriage and adapted to rot-ate a cylinder,

a device dtor coating rolls with liquid comprising a tank adapted to be moved horizontallybysaid tool carriage, a nozzle communicating with said tank through a flexible tube, said nozzle having a-dow n-turned end provided with an outlet, said nozzle being vertically reciprocative above the rotating cylinder, saidoutlet contacting the cylinder and conforming to irregular surfaces of said cylinder substantially as set forth.

In testimony whereof I have signed my .name to this specification in the presence of the two subscribing witnesses.

- i EDUARD MERTEN S. Witnesses:

Geo. GIFFORD,

MAX ORTMANN. 

